Question

If a straight line $y=2x+k$ passes through the point $(1,2)$, then the value of $k$ is equal to

• A. $0$
• B. $4$
• C. $-4$
• D. $8$

Answer 1

The correct option is A $0$

Consider the given equation.

$y=2x+k$

Since, this line passes through the point $(1,2)$

So,

$2=2\times 1+k$

$2=2+k$

$k=0$

Hence,option A is the answer.